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ACM.60 Create a VPC with a CloudFormation template

It is a continuation of my sequence of posts on Automating Cybersecurity Metrics.

We will want a VPC for some configuration modifications I plan to make, together with some subnets and safety teams. There’s additionally a VPC, subnet, and safety group that I ought to have created from the start, however now I am simply getting began.

Notice that I am not going to cowl each facet of making a VPC, simply what’s related to our present structure and possibly a bit in regards to the connections for builders creating it, although the choices may be totally different in an enormous approach. enterprise.

CIDR blocks and community ranges

This put up is written for individuals who perceive CIDRs and community ranges as a result of any firm involved with safety will rent somebody internally or as a contractor to design their networks who is aware of learn how to assign IP addresses. Nonetheless, I will present the values ​​you may go should you’re not a networking guru which should not trigger any issues should you’re engaged on a check account that does not have conflicting assets.

On this put up I’m utilizing the next for my VPC implementation. We are going to broaden on this in future posts.


listing construction

Create a brand new listing: Community. Create the identical subfolders as we did earlier than: stacks > cfn.

We are going to create our CloudFormation templates within the cfn folder and a deployment script within the stacks folder. We are going to put a check script within the root folder.

I created the next templates within the cfn folder:

Useful resource names and labels

A number of the above assets in AWS wouldn’t have a “identify” property. Create a reputation for the useful resource by defining a “tag” which is a key-value pair. Set the important thing to “Identify” and the worth to no matter identify you need. the AWS console magically discovers that the identify tag is the identify of your VPC and shows it accordingly.

Add a “community” AWS CLI profile

Create the “community” AWS CLI profile. As a reminder, we’re simulating totally different groups with totally different tasks right here.

We create a NetworkAdmins group, a job and a NetworkAdmin person. Add MFA and credentials to your person and use them as described within the subsequent put up to create your profile, which is utilized by the scripts beneath.

Replace the permissions for the community function

We have to replace the permissions for the community administrator function to permit it to deploy community assets. Most of our community assets can be on the EC2 service. Since networking can get messy, I’ll briefly permit ec2.*. That is typically not advisable and positively not for anybody you do not need to permit to alter your community assets.

It is unlucky that networks are tied with permissions to create digital machines within the cloud, because it makes it tough to create zero-trust insurance policies. Let’s run our templates after which return and revise the insurance policies to be zero-trust insurance policies utilizing the tactic I confirmed you earlier on this put up:

Return to the IAM folder. Modify the coverage for community directors and redeploy it:


Create a digital non-public cloud (VPC or your individual community inside the AWS community). Let’s maintain it versatile as we go the CIRD Y Identify. That approach, we will reuse this template later to create further VPCs.

VPC assets are fairly easy:

We’ll have to reference this VPC later, so add outputs:

Be sure that the export identify is exclusive as a result of we will reuse this template to create a number of VPCs.

Implement script

I all the time like to check on the fly, so I’ll leap in and create a deployment script and check what we now have thus far.

Embrace shared features.

We are going to permit our community profile to implement these assets that we created earlier within the sequence.

Go the suitable parameters to implement our stack utilizing the shared perform:

Create the deployment script

Create a deployment.sh script on the root of the /community/stacks folder.

Deploy and validate your VPC:


Verify that your VPC has been created. Though VPC permissions pertain to EC2, there’s a separate VPC panel and you need to see your VPC there.

Create a check script within the community listing.

As with our different subfolders, we need to create a check script in order that we will automate testing that every one of our scripts are working correctly. Add a check script to the community listing and verify within the check script to the foundation listing.

We aren’t accomplished with this template. Comply with the updates to make use of a single template and create a public or non-public VPC.

Teri Radichel

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